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-rw-r--r--net/ethtool/plca.c248
1 files changed, 248 insertions, 0 deletions
diff --git a/net/ethtool/plca.c b/net/ethtool/plca.c
new file mode 100644
index 000000000000..5a8cab4df0c9
--- /dev/null
+++ b/net/ethtool/plca.c
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/phy.h>
+#include <linux/ethtool_netlink.h>
+
+#include "netlink.h"
+#include "common.h"
+
+struct plca_req_info {
+ struct ethnl_req_info base;
+};
+
+struct plca_reply_data {
+ struct ethnl_reply_data base;
+ struct phy_plca_cfg plca_cfg;
+ struct phy_plca_status plca_st;
+};
+
+// Helpers ------------------------------------------------------------------ //
+
+#define PLCA_REPDATA(__reply_base) \
+ container_of(__reply_base, struct plca_reply_data, base)
+
+static void plca_update_sint(int *dst, const struct nlattr *attr,
+ bool *mod)
+{
+ if (!attr)
+ return;
+
+ *dst = nla_get_u32(attr);
+ *mod = true;
+}
+
+// PLCA get configuration message ------------------------------------------- //
+
+const struct nla_policy ethnl_plca_get_cfg_policy[] = {
+ [ETHTOOL_A_PLCA_HEADER] =
+ NLA_POLICY_NESTED(ethnl_header_policy),
+};
+
+static int plca_get_cfg_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct plca_reply_data *data = PLCA_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ const struct ethtool_phy_ops *ops;
+ int ret;
+
+ // check that the PHY device is available and connected
+ if (!dev->phydev) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ // note: rtnl_lock is held already by ethnl_default_doit
+ ops = ethtool_phy_ops;
+ if (!ops || !ops->get_plca_cfg) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out;
+
+ memset(&data->plca_cfg, 0xff,
+ sizeof_field(struct plca_reply_data, plca_cfg));
+
+ ret = ops->get_plca_cfg(dev->phydev, &data->plca_cfg);
+ ethnl_ops_complete(dev);
+
+out:
+ return ret;
+}
+
+static int plca_get_cfg_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ return nla_total_size(sizeof(u16)) + /* _VERSION */
+ nla_total_size(sizeof(u8)) + /* _ENABLED */
+ nla_total_size(sizeof(u32)) + /* _NODE_CNT */
+ nla_total_size(sizeof(u32)) + /* _NODE_ID */
+ nla_total_size(sizeof(u32)) + /* _TO_TIMER */
+ nla_total_size(sizeof(u32)) + /* _BURST_COUNT */
+ nla_total_size(sizeof(u32)); /* _BURST_TIMER */
+}
+
+static int plca_get_cfg_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct plca_reply_data *data = PLCA_REPDATA(reply_base);
+ const struct phy_plca_cfg *plca = &data->plca_cfg;
+
+ if ((plca->version >= 0 &&
+ nla_put_u16(skb, ETHTOOL_A_PLCA_VERSION, plca->version)) ||
+ (plca->enabled >= 0 &&
+ nla_put_u8(skb, ETHTOOL_A_PLCA_ENABLED, !!plca->enabled)) ||
+ (plca->node_id >= 0 &&
+ nla_put_u32(skb, ETHTOOL_A_PLCA_NODE_ID, plca->node_id)) ||
+ (plca->node_cnt >= 0 &&
+ nla_put_u32(skb, ETHTOOL_A_PLCA_NODE_CNT, plca->node_cnt)) ||
+ (plca->to_tmr >= 0 &&
+ nla_put_u32(skb, ETHTOOL_A_PLCA_TO_TMR, plca->to_tmr)) ||
+ (plca->burst_cnt >= 0 &&
+ nla_put_u32(skb, ETHTOOL_A_PLCA_BURST_CNT, plca->burst_cnt)) ||
+ (plca->burst_tmr >= 0 &&
+ nla_put_u32(skb, ETHTOOL_A_PLCA_BURST_TMR, plca->burst_tmr)))
+ return -EMSGSIZE;
+
+ return 0;
+};
+
+// PLCA set configuration message ------------------------------------------- //
+
+const struct nla_policy ethnl_plca_set_cfg_policy[] = {
+ [ETHTOOL_A_PLCA_HEADER] =
+ NLA_POLICY_NESTED(ethnl_header_policy),
+ [ETHTOOL_A_PLCA_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1),
+ [ETHTOOL_A_PLCA_NODE_ID] = NLA_POLICY_MAX(NLA_U32, 255),
+ [ETHTOOL_A_PLCA_NODE_CNT] = NLA_POLICY_RANGE(NLA_U32, 1, 255),
+ [ETHTOOL_A_PLCA_TO_TMR] = NLA_POLICY_MAX(NLA_U32, 255),
+ [ETHTOOL_A_PLCA_BURST_CNT] = NLA_POLICY_MAX(NLA_U32, 255),
+ [ETHTOOL_A_PLCA_BURST_TMR] = NLA_POLICY_MAX(NLA_U32, 255),
+};
+
+static int
+ethnl_set_plca(struct ethnl_req_info *req_info, struct genl_info *info)
+{
+ struct net_device *dev = req_info->dev;
+ const struct ethtool_phy_ops *ops;
+ struct nlattr **tb = info->attrs;
+ struct phy_plca_cfg plca_cfg;
+ bool mod = false;
+ int ret;
+
+ // check that the PHY device is available and connected
+ if (!dev->phydev)
+ return -EOPNOTSUPP;
+
+ ops = ethtool_phy_ops;
+ if (!ops || !ops->set_plca_cfg)
+ return -EOPNOTSUPP;
+
+ memset(&plca_cfg, 0xff, sizeof(plca_cfg));
+ plca_update_sint(&plca_cfg.enabled, tb[ETHTOOL_A_PLCA_ENABLED], &mod);
+ plca_update_sint(&plca_cfg.node_id, tb[ETHTOOL_A_PLCA_NODE_ID], &mod);
+ plca_update_sint(&plca_cfg.node_cnt, tb[ETHTOOL_A_PLCA_NODE_CNT], &mod);
+ plca_update_sint(&plca_cfg.to_tmr, tb[ETHTOOL_A_PLCA_TO_TMR], &mod);
+ plca_update_sint(&plca_cfg.burst_cnt, tb[ETHTOOL_A_PLCA_BURST_CNT],
+ &mod);
+ plca_update_sint(&plca_cfg.burst_tmr, tb[ETHTOOL_A_PLCA_BURST_TMR],
+ &mod);
+ if (!mod)
+ return 0;
+
+ ret = ops->set_plca_cfg(dev->phydev, &plca_cfg, info->extack);
+ return ret < 0 ? ret : 1;
+}
+
+const struct ethnl_request_ops ethnl_plca_cfg_request_ops = {
+ .request_cmd = ETHTOOL_MSG_PLCA_GET_CFG,
+ .reply_cmd = ETHTOOL_MSG_PLCA_GET_CFG_REPLY,
+ .hdr_attr = ETHTOOL_A_PLCA_HEADER,
+ .req_info_size = sizeof(struct plca_req_info),
+ .reply_data_size = sizeof(struct plca_reply_data),
+
+ .prepare_data = plca_get_cfg_prepare_data,
+ .reply_size = plca_get_cfg_reply_size,
+ .fill_reply = plca_get_cfg_fill_reply,
+
+ .set = ethnl_set_plca,
+ .set_ntf_cmd = ETHTOOL_MSG_PLCA_NTF,
+};
+
+// PLCA get status message -------------------------------------------------- //
+
+const struct nla_policy ethnl_plca_get_status_policy[] = {
+ [ETHTOOL_A_PLCA_HEADER] =
+ NLA_POLICY_NESTED(ethnl_header_policy),
+};
+
+static int plca_get_status_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct plca_reply_data *data = PLCA_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ const struct ethtool_phy_ops *ops;
+ int ret;
+
+ // check that the PHY device is available and connected
+ if (!dev->phydev) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ // note: rtnl_lock is held already by ethnl_default_doit
+ ops = ethtool_phy_ops;
+ if (!ops || !ops->get_plca_status) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out;
+
+ memset(&data->plca_st, 0xff,
+ sizeof_field(struct plca_reply_data, plca_st));
+
+ ret = ops->get_plca_status(dev->phydev, &data->plca_st);
+ ethnl_ops_complete(dev);
+out:
+ return ret;
+}
+
+static int plca_get_status_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ return nla_total_size(sizeof(u8)); /* _STATUS */
+}
+
+static int plca_get_status_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct plca_reply_data *data = PLCA_REPDATA(reply_base);
+ const u8 status = data->plca_st.pst;
+
+ if (nla_put_u8(skb, ETHTOOL_A_PLCA_STATUS, !!status))
+ return -EMSGSIZE;
+
+ return 0;
+};
+
+const struct ethnl_request_ops ethnl_plca_status_request_ops = {
+ .request_cmd = ETHTOOL_MSG_PLCA_GET_STATUS,
+ .reply_cmd = ETHTOOL_MSG_PLCA_GET_STATUS_REPLY,
+ .hdr_attr = ETHTOOL_A_PLCA_HEADER,
+ .req_info_size = sizeof(struct plca_req_info),
+ .reply_data_size = sizeof(struct plca_reply_data),
+
+ .prepare_data = plca_get_status_prepare_data,
+ .reply_size = plca_get_status_reply_size,
+ .fill_reply = plca_get_status_fill_reply,
+};
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